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超低空飞行 chāodīkōng fēixíng
avia.	belly down; buzzing; nap-of-the-earth flight (flying); super low flight
skydive.	contour-chasing; contour-flying; daisy-dipping; contour flight; crazy flight; hedgehop; treetop flight
space	extreme low-altitude flight; hedge-hopping flight; on-the-deck flying; on-the-duck flight
tech.	fly at zero
超低空〔在一千英尺高度以下〕飞行
construct.	fly at zero

超 低 空飞行 : 5 phrases in 4 subjects

Air defense	1
Aviation	1
Electronics	1
Space	2